About: http://webisa.webdatacommons.org/147881405

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The illness is caused by influenza virus types A and B which undergo frequent mutations and antigenic re-assortments.???This antigenic drift necessitates the production of new influenza vaccines annually.
http://www.w3.org/ns/prov#wasQuotedFrom	nanobio.com